legate of the 18th legion of the Roman army on the Rhine, at the time of the Batavian revolt (A. D. 69). On account of the firmness with which he opposed a mutiny against Hordeonius Flaccus, he was made commander-in-chief by the soldiers in place of that general. Not venturing to attack Civilis in the field, he fixed his camp at Gelduba, and shortly afterwards quelled another mutiny, which had broken out during his absence on an incursion against the Gugerni. [HERENNIUS GALLUS.] He afterwards carried on the war with some success, but neglected to fellow up his advantage, in all probability because, like the other commanders, he was a partizan of Vespasian, and did not wish that, by the destruction of Civilis, the legions of Germany should be set at liberty to go to the aid of Vitellius. On the other hand, the common soldiers, who were strongly attached to Vitellius, were for this reason in a state of almost constant mutiny, and on one occasion, when Hordeonius Flaccus was killed, Vocula only escaped by flying from the camp dressed as a slave.
He was soon after joined again by three legions, with which he took possession of Magontiacum.
In the revolt of Treviri, under Classicus and Tutor (A. D. 70), Vocula was forsaken by his army at Novesium, and was put to death by a deserter named Aemilius Longinus, whom Classicus sent into the camp for that purpose. His soldiers were marched off to Treviri, and meeting on their way with Longinus, they put him to death. (Tac. Hist. 4.24